package zuoye01;

public class Circle {
  public double r;
  public Circle (){
      this.r=1;
  }

    public double getR() {
        return r;
    }

    public void setR(double r) {
        this.r = r;
    }
    public double findArea(){
      double s = 3.14 * r * r;
      return s;
    }

}
